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在1990年5月18日,我们公司开通了全国第一个集群电话公众通信系统。集群电话系统是一种新型的移动通信系统。它能使大量用户共享若干组频率资源而不互相影响。当某一集群用户欲与另一(有线或无线)用户通信时,系统自动为它分配一条通信路径。一旦通信结束,此通信信道便为他人所用。因此,集群系统也称为无线中继
On May 18, 1990, our company opened the nation’s first trunked telephone public communication system. Trunk telephone system is a new type of mobile communication system. It enables a large number of users to share several sets of frequency resources without affecting each other. When a cluster user wants to communicate with another (wired or wireless) user, the system automatically assigns a communication path to it. Once the communication is over, the communication channel is used by others. Therefore, the cluster system is also called a wireless relay